/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.nifi.event.transport;

/**
 * Event Server
 *
 */
public interface EventServer {
    /**
     * Shutdown Event Server and close resources
     */
    void shutdown();

    /**
     * Returns the port that the server is listening on, if available. If unable to determine the port, will return 0.
     * @return the port that the server is listening on, or 0 if unable to determine the port
     */
    int getListeningPort();
}
